In this work, the climatic impacts of modifying urban surface characteristics are examined for the medium-sized city of Vantaa, Finland, in the current climate and in a projected future climate of 2040–2069. In simulations with the SURFEX air-surface interaction model with a horizontal resolution of 500 m, the fraction of green spaces and relatively sparsely built suburban-type land use was increased at the expense of more densely built commercial and industrial areas. The influence of this land use intervention was found to be rather modest but comparable to the effects of the expected climate change under the RCP8.5 greenhouse gas scenario. For temperature, the climate change is the dominating effect, while wind speed is mainly controlled by surface characteristics. For relative humidity, climate change and the imposed intervention are of comparable importance. The results of this sensitivity study are intended to support policy makers by assessing the potential impact of altering the urban layout in order to improve thermal comfort or as a countermeasure to climate warming in a high-latitude city.

在这项工作中，研究了在当前气候和预计的2040-2069年未来气候中，芬兰万塔的中型城市的城市表面特征改变对气候的影响。在使用水平分辨率为500 m的SURFEX空气表面相互作用模型进行的模拟中，绿地的比例和相对稀疏的郊区型土地利用增加了，但以更密集的商业和工业区为代价。人们发现，这种土地利用干预的影响相当小，但与RCP8.5温室气体情景下预期的气候变化的影响相当。对于温度而言，气候变化是主要的影响因素，而风速主要由表面特征控制。对于相对湿度，气候变化和强加的干预具有同等重要的意义。这项敏感性研究的结果旨在通过评估改变城市布局的潜在影响来为决策者提供支持，以改善热舒适度或作为高纬度城市气候变暖的对策。